Buna 70-329-Black-Pk5

SB-H70329-5 is an AS568-329 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 1.975 in (50.17 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.395 in (60.83 mm). In service, this o-ring compresses into its gland to block fluid or gas migration across a joint. Supplementary detail from the product record: 2.375IDX2"ODX.1875"CS.

Buna-N (Nitrile) is specified for strong abrasion and tear resistance, low compression set under sustained load. The material holds up against water, greases and lubricants, and many alcohols. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving strong acids or ketones call for a different compound.

Maintenance and OEM teams specify it across general industrial maintenance, construction equipment, and automotive.

Reference part number SB-H70329-5 when ordering; the item is sold by the bag. Nominal inside diameter is listed as 2 inch. Check the compound against your process media, pressure and temperature before committing to a design.